Door lock



' March 6, 1945. M ALK 2,370,645

DOOR LOCK Filed March 5, 1941 5 Sheets-Sheet 1 March 6,' 1945. FALK 2,370,645

DOOR .LOCK 7 Filed March 5, 1941 3 Sheets-Sheet 2 FLQ- 3. 92 1 INVENTOK M. FALK DOOR LOCK March 6, 1945.

Filed March 5, 1941 3 Sheets-Sheet 3 H hi Patented Mar. 6, i945 UNITED STATES PAT-Eur; OF ICE;

k 7 Door, LooK Morris Falk, Leominster, Mass.,- assignor to Independent LockCompany, Fitchburg, Mass a corporation of Massachusetts Application March 5, 1941, Serial-No. 381,893

6 Claims. (01. 292-359) My present invention relates generally to door locks, and has'particula'r reference to that type of device generally referred to asbathroom locks. Still more particularly, my invention relates to door locks of tubular construction wherein a latch bolt is mounted for reciprocation, including a novel assembly of latch reciprocating parts to provide a compact construction.

Still more particularly, my invention relates to a door knob spindle operated latch, and looking mechanism therefor, still further particularized by including resetting mechanism for the locking construction.

In certain phases of my invention, this application is a continuation in part of my application for Auxiliary latch, Serial No. 335,704, filed May 17, 1940, now Patent No. 2,293,645, granted August 18, 1942 and in other phases, relating to looking mechanism for the latch operating spindle, my invention is an improvement'of my application for Knob spindle lock, Serial No. 229,050, filed September 9, 1938, now Patent No. 2,234,912, granted March 11, 1941. I

For the purpose of explaining the general nature of my invention, it may be pointed out that the present device is primarily intended for use on a door of a bathroom or the like, in which a latch bolt is retracted by'a rotary spindle grasped by a door knob, which latch bolt is normally spring projected into an orifice of a strike plate mounted upon the frame'of the door, to hold the door in locked position. c

Mly invention has as its objective, an association of parts which allows the entire mechanism "to be contained withinia substantially tubular housing, the latch bolt being mounted for axial reciprocation into and out of e the end of the housing. As a result, the installation of the present lock is greatly facilitated since it may be inserted endwise into a, substantially cylindrical hole drilled into the edge of the door, and requiring simple transverse drillings to locate the lock in position. H

Still more particularly, my invention has as an object thereof the provision of a lock of coma pact assembly, preferably in the form of a tubular housing in which a latch bolt extends adjacent one end thereof and includes retractor means operated by rotation of the door knob spindle, and wherein, within such housing, mechanism is provided for the retraction of the latch bolt whereby a rotary movement of the latch operating spindle transmits motion of magnified reciprocal character to the latch bolt.

A still further object of my invention resides in providing in a latch, preferably one wherein a spring projected latchbolt is retracted by a latch operating spindle, of locking mechanism for said latch operating spindle wherein a simple rotary. movement'may throw the lock mechanism into lockingengagement with the latch operating spindle, andfurther characterized by the feature that the locking means for thelatch operating spindle is of compact construction for assembly with a tubular housing of the latch, requiring only simple drilling operations in the door to locate the same, and still further characterized by providing the locking means for the latch operating spindle which may be located in a variety of positions, whether or not the door operates inwardly, outwardly, or swings either .to the right or to the left. v

' My invention still further has as an object thereof the provision, in latch bolts ofthe character described, of locking mechanism therefor,

more particularly characterized by effecting the locking action in relation to the latch operating spindle, and further characterized by including resetting mechanism for the locking means, whereby accidental positioning of the locking mechanism in looking engagement with the latch operating spindle will be overcome, in that my invention provides that upon inward projection of -the latch bolt, with the locking means for the latch operating spindle in the locked position, when the latch bolt strikes the strike plate of the door frame, the locking mechanism will be reset, to permit operation of the latch operating spindle.

Among the important features of my invention are, the special configurations and relative arrangements of the'various parts of the device, including those heretofore mentioned, whereby the desire simplicity and compactness of assembly are achieved.

To attain these, objects and advantages, and

such further objectsand advantages as may be pointed out hereafter or become apparent as this description proceeds, I make reference to the accompanying drawings, forming a part here of, in which Figure l is a perspective exploded view of my assembly, with portions thereof shown in dotted lines to show alternative positions of the locking means for the latch operating spindle;

Figure 2 is a fragmentary side view of my device, with the locking mechanism forthe latch operating spindle positioned to permit rotation of the latch operating spindle; I

spectively, 'tmougntiig'sibts st nd 31: 4

the locking mechanism for the latch operating spindle positioned to hold the latch operating spindle in locked position;

Figure 4 is a transverse, fragmentary sectional View taken on the line 4-4 of Figure 2, with the rose plates and lock operating spindle shown in position;

Figure 5 is a, fragmentary, longitudinal sectional view taker! 'on the line qt Flgigrgfia;

Figure 6 is a transverse fragmentary sectional view takenxon the line 6-6 of Figure 2, with the 7 locking means in position to permit rotation of the latch operating spindle;

Figure 7 is a view similar to, 6, taigeriz on the line 'l1 of Figure 3;; 4 4 v I V Figure 8-is a perspective view of the locle re.- setting link.

Making reference to the drawings", there is" shown a housing l0, preferably of substantially tubular cross-section, comprising a rear section H3 die cast-integrall ywiththe plate IZ: "The plate may-be surface-veneered with; brass sheathing 1:3; and throughthis sheathing-and plate;

rifices. I 4* are provided foramxation tothe door e. is; counterjor'frame; as will bereadi-ly underand preferably integrai therewith, i provide roll A back cams 49,. These. cams are positioned in close adjacency to the rear section I I. With the collar and the roll back cams thus positioned, I provide a reciprocal link 50, having spaced arms 5+, riding slidably against the roll back cams 49. These. arms 51 are each provided with downwardly disposed shoulders 52, arranged to be engaged: by; roll: back cams 49.

Thelink 5Q is formed with an ofiset 54 at its forward end, which terminates in a lug 55, the

' faceof Whichi arcuately curved, thereby providing a recess 56, normally lying adjacent a seat, dlitvhich seat; has an upstanding pivot pin 58 upon which is rotatably pos-itioned' a lever 59; lying transversely across the housing. This lever isiormed" with a concave bearing surface 60,, engaged bythe lug 55. The end 6| of the lever 59 is seated within a, recess 62* formed in one face ofthe finger 28, the end' 63- whereof is engaged b the end BI'of the lever 59.

The construction thus far described is finally assembled bywsuperimposing the cover member mover the rear section H; by' having the front end formed with a tongue 54, which enters an orifice in the plate "l2. The opposite; end of the coverrnemherf H is afiixe d' to the rear section the orifice l8- adjacent the-- forward end of" the spaced from the orifice 18.

W t n the I .1 5. tsc bdtli'p id a latohholt; 25; having a camming nose; 2G; The latch bolt 25 orifice, I8}.

housing, thereby forming a shoulder portion 24,

is ap e lid b t ter Rearwardlfy of the latch bolt; 25;; there; are

Prq ide u d fin'z rs T n 28:: u nt l y axiallypositioned transversely in relation to the latch bolt; thereby 'f'ormihgthe; shoulders 29 to f i i f hefi er s Th fin ers; H d" 1 are di p d n ith r Side f e at h b lt lfi thereby forming-stops t. l b h rv w flat.v ith, this do r jcr' e, he at h. h ltme be, m l st d hr u the orifice 1'8. 170K511? limits; permitted by, the pro"- Jections provided by" the stops '30.

D s qs d mm he. ect on L he e s r v ded s udv s r av e; abutment r latch 1 Project nsfi il hi li: re se a ts p'ositeend33- against the rear face-54; of thebolt 25, between the fingers 2 1-an 25, The rear section H and" the cover section IT or the housing are formed with oppositely disposed-slots, 36 and 3-1; thereby also formingjthe "stud? 3| intoa pair of upstanding iirigersjdeflnin'gia guide slot" 38 therebetween.

With the slots 35; 31" and sati provided,

I position aslider 35. This-slider'isformed" with a finger 40, which is directed through'the slot 38' and enters the orificethrough the spring 32, serving as a-spring ;mounti 7 The end'4l of the finger is forwardly disposed" to enter thejcentering latch: bolt K t orm d? th n ed q cns: d; 1 d p Pass.

Other functions of sli appear I'I'by; the passage" of" a fastening element, such as a screw 65; through the; orifice, 66; engaging a complementary orifice: Bl formedin the rear'section H.

The construction; thus far described, where formed; into a tubular latch, has novel features in. that rotation of, the spindle 48 through the medium of the collar 45,, which in turn swings theroll back cams 49 either clockwise or countereloekwise, serves to reciprocate the link 50 by engagement of the. rollback cams: 4 9 with the shoulders 5-2; There'ciprocalmovement is transittdy hro gh t lu 56% th lever 9 w in, pivoting; about the, pin 58; transmits reciprocal mqven ent; to the latch b olt'2 5 where. it engages the end 63;. The reciprocal movement imparted to the link 50 i thereby 'mnltiplied so that a small rotary movement of the 'co1lar4'5 magnifies the reciprocal movement off-the,- latch bolt 25; In the iliustration given, a two-fold magnification oft-lie movement is'secured Thecon'struction as; thus far describedis particularly novel in that inpa tubular casing provided by me, the parts; are nested' together compactly; while securing-the requisite withdrawal oi thelatch bolti It will alsobeobserved that while rotaryfm'ovement ofthe collar 45 will features, without further alteration. However, I find it desirable, where this latch is to be used for bath room doors, to include a locking device. While the locking device of my application Serial No. 229,050, is readily adaptable for this purpose, I will now describe my improved knob spindle locking device. I

For this purpose I provide a'plate 08, having an orifice 69 in which asubstantially circular member 19 is mounted, having a bearing shoulder H engaging the orifice 69. This substantially circular member 19 is formed with a keying. orifice 12, adapted to be mounted in keying engagement with the latch operating. spindle 48. This circular member has a peripheral flange 13 which is recessed at M for'purposes which will appear hereinafter.

-Adjacent the bottom of the plate 98, there is provided an orifice 15 within which is mounted a rack pinion 16, for rotary movement. The rack pinion 1B is provided with a keying orifice ll,

arranged to receive the lock operating spindle. The teeth 19 of the rack pinion engage a, rack bar 80 mounted for transverse reciprocation in a slot 81 formed in the plate 68. The rack bar 80 is formed with a recess 82, leaving the major portion or upper surface 83 unrecessed.

To complete the assembly of the locking means thus far described, I provide a cover plate 84, orificed at 85 and 86, serving as exterior bearing portions for the substantiallycircular member 10 and the rack pinion IE6. Thecover member may be held in position by rivets 81, thereby holding thecircular member 10 and the rack pinion 16 in position, as well as toprovide aguide for the rack bar 80.

Friction may be imparted to the rack bar 80, and to compensate for a difference in thickness of the rack bar 80, a resilient tongue 98 is struck from the cover plate 84, which presses down along the side walls of the rack bar 88.

The locking means for ,the latch operating spindle thus described embodies some of the features of my invention for vKnob spindle .locks, Serial No. 229,050, as will appear more clearly hereinafter, and while the plate 08 may be for a separate assembly on the exterior face of the door, such as beneath the escutcheon plate through which the latch operating spindle is disposed, I prefer in this assembly, after the tubular housing i9 is positioned within the door orifice 89, to position the locking means for the latch operating spindle to one side of said lock, and for this purpose I provide the casing rear section I I and cover section I? with screw threaded orifices 90. Orifices 9| are formed through the plate 08 and cover 84 in complementary position with the upper or lower pairs of orifices 99. Screws 92 may there bev used to affix the lockin assembly to the casing l0. For this purpose, the rear section H and cover portion l! are tapered, thereby to receive the plate 08 in abutting position. Attachment is made to align the keying orifice 41 of the collar 45 and the keying orifice 12 so that the latch operating spindle 48 may pass through the orifices ll and 12.

Mortising of the door with anopening as will serve to receive the locking means to one side of the housing [0, as more clearly shown in Figure 4. The opening 93 terminates into a trans verse boring 94, into which the lock operating spindle 18 may extend.

The assembly as shown in Figure 1 is intended fora door which opens outwardly about hinges to the right of the door. Should it be found desirable to invert the position, as where the door may swing inwardly, and to invert the latch bolt 25, the locking means may be positioned as shown in dotted line in Figure 1, the orifices 90 being positioned to receive the locking assembly in a variety of positions upon a choice of any pair of the orifices 90.

With the assembly thus far described, it will be observed that locking means have beenprovided for a door lock and for the latch operating spindle thereof wherein, upon positioning of the tubular casing in the door orifice 89, with the locking assembly thereafter aifixed in position, the outer escutcheon plate 95 is placed in position. Thereafter, the, outer knob 96 and the latch operating spindle 48 are placed in position by passing the spindle '48 through the orifice 41 and thence through the orifice 12. The inner escutcheon plate'9l is then aflixed by the screws 98 and the inner knob 99 is then mounted upon the interior end of the latch operating spin dle 48, in a manner readily understood. The inner escutcheon plate 91 is provided with a bearing orifice I00, mounting the locking operating spindle 18, and is held in thi position by the cross pin "H, a cross handle I02 being disposed in convenient position beneath the knob 99.

With the assembly thus far described, it will be understood that the latch,operating spindle may be rotated in a clockwise and,counterclo ckwise direction,'t0 retract the latch bolt 25, as already described.

In the normal position of the latch operating spindle 48, as shown in Figure 2, the peripheral recess 14 of the circular memberlll is adapted to be interfitted by the unrecessed edge portion or upper edge 83 of the rack bar 90, which serves as the locking element.

In the position shown in Figure 2, the rack bar 89, which constitutes thelocking element, has the recess 82 so that the unrecessed portion of the eripheral flange 13 may pass by the recessed portion 82 of the rack bar or looking element 80. However, by aligning the edge 83 with its unrecessed portion interfitting with the recessed portion M of the circular member 10, the latch operating spindle 48 will be held in locked position due to the fiat interengagement of the surfaces which are now in contact with.

each other, as will be more clearly evident from an inspection of Figure 3. This position is achieved when the rack pinion 16 is rotated in a counter-clockwise direction from the position shown in Figure 2, to the position shown in Figure 3. Conversely, rotation of the rack pinion 16 in e, clockwise direction from the position shown in Figure 3 to that shown in Figure 2 will position the recessed portion 82 of the locking element or rack barto interfit with the unrecessed periphery of the substantially circular member 10, thereby permitting the latch operating spindle to be rotated in a clockwise or counter-clockwise direction for retracting the latch bolt.

It will thereby be observed that while some of the novel features of my prior application Serial No. 229,050 are utilized, such locking action is achieved by a reciprocating movement of the locking element which, in the present invention, is in the form of the rack bar 80.

I avail myself of this reciprocating movement of the locking element in the form of the rack bar 80 to accomplish additional novel features.

It is found that accidentally the locking means may be set into position locking the latch operating spindle. Should this occur with the door alias; itwill: beevident thatuponcloslng the door, the; latch bolt 25', upon striking the: strike plate of: the door casing; willi thereby engage the strike plate orifice andIlock-the door. Should the room he unoccupied or enclose a child unacquainted with the ,operation of the device, unusual means may be. necessary to gain access tothe locking mechanism; To avoid this accidental locking off" the latch operating spindle, I provide the rack bar 80 with: an extension branch H33; disposed upwardly and transversely to the slots 36 and 31. This extension branch is alsoprovided Witha notch I03 which is aligned with the Winged: sections 43- and 43'. These-latter members are formed} with: shoulders from: the fingers I06.

It will be observed that where a condition of:

H155 inwardly disposedthe locking mechanism is obtained to" lock the latch operating spindle; as: shown in: Figures 3'- and? 7', the rack: bar 80 is projected so that the extension branch N13 is: such as to interengag'ethe' 'notch H14: with the shoulder H35 of theslider 38 Should this condition exist. with the door ajar, upon closing the door the latch bolt will be projected inwardly as it strikes the strike l plate of'the door casing, therebyprojecting the- Slider 39' to: the position shown in dotted lines in: Figure 6.

Thi'saction will serve to move the rack bar 80 tothe position shown in- Figures 2" and 6', thereby aligning the recessed portion 82 to the unlocking position, releasing the locking mechanismand permitting rotation of thelatch operating spindle 48 or, in other words; resetting thelocking means to apos'ition wherethe latch open ating spindle may be rotatedin acl'ockwiseor counter-clockwise position.

Whilethe zvrim'ary utility or device" is in connection with bathroom doors, it will be understo'od that other applications of this device will occur-to those-sliilleddn theatte Thus, also, while: the lock resetting mechanism" has been described as avoiding the-hazard or inconvenience-of locking the latch operating spindle; my locking mechanismbeing controlled by a rotary movement of the lockoperating spindle T8 this spindle may utilizedfor operating" the look-- ing mechanism from the exterior side" of the For purpose, the lock operatingspindle l8 may-be provided with a keying slot H11, accessible through anorifice I08 formedi'n the-outer escu'tcheon plate 95 so= that such instrumentality as akey or screw driver Hi9.- maybe used to un-j lock the locking mechanism; should some occupant of the roomihave placed the locking mech'-' anism into locking osition;

It will further; be understood that while the primary application of my deviceisinten-ded for toj' be limited to the assembly of all of these fe'afures'ih one mechanism, but that these fea a a-re ents.

tures have utility separate and apart from eachother, as. encompassed by the appended claims.

Having thus. described my invention. and. illustrated its use, what I claim as new and desire to secure by Letters Patent, is-- 1-. Locking means for a door lock having alatch bolt and a latch operating. spindle,- said lock including an assembly whereby rotation: of said spindle will retract the; latch bolt, the com-- binationcomprising a plate assembly positionable to one side of said lock and through: whichsaid' latch. operating spindle may extend, said: plate assembly'including a lock operating; spindle, complementary locking means comprising a; substantiallycircular member and a-locking element. operative ly carried; respectively, by said: spindles for eifecting locking of said; latch operating spindle by rotary movement ofsaid lock-2 operat-- ing spindle, said member including" an orifice therethroughand through which. said: latch; op.- crating spindle may extend in keying engagement, and being formed and mounted. on; said. plate to; permit rotation for retraction of. the latchbolt, said. member including: a peripheraiz recess adapted to-be interfitted by an unrecessedportion of'said locking element operated by saidilochopcrating spindle, said locking element compris inga slidabl'e section including a recess. so that the unrecessed portion of; thememben may pass by the recessed portion of said element to permit rotation of said latch: operating spindle, and upon alignment of said element sli'dably, with: its unrecessed porti'on' interfittingwith the recessed portion of said-member, said latch operating spindle will be held: in locked' positionz 2. Locking means for a door lock having: a latch bolt and a latch operating spindle, said lock including an assembly whereby rotation of terfitted by an unrecess'ed portion-of saili locking element operatedby'said" lock operatingspindle,- said locking element comprisinga slidable sectiori including a recess, so that the unrecessed portion of the member may pass by. the recessed portion ofsaid element to permit rotationof said latch operating spindle, and uponalignment ofsaid element slidabl y, with its unrece'ssed portion interfitting with the recessed pos tion of said member, said latch operating spindle: Will be held in locked position, said locking element comprising a rack bar interconnected by a pinion gear to said lock operating: spindle for imparting slidable movement tosaid element l '3. Lockingmeansfora doorlock having-alatch bolt and a latch operatingspindle; said lock including an assemblywhereby rotation of said spindle will retract the latch bolt, the combination comprising a plate assembly positionable to one side of said-locltan'd through whibh said latch operating spindle may extend, said plate assembly including a lock operating spindle, complementary locking means comprising a substantially circular member and a locking element oneratively carried, respectively, by said spindles by the recessed portion of said element to permit rotation of said latch operating spindle, and upon alignment of said element slidably, with its unrecessed 'portion interfitting with the recessed spindle will be held in locked position, said locking element comprising a rack bar interconnected by a pinion gear to said lock operating spindle for imparting slidable movement to said element, said rack bar including an extension branched therefrom lying in the path of move ment of a portion movable by the latch bolt.

4. In a lock having a substantially tubular housing and a reciprocable latch-bolt therein which is independently depressible to a retracted position, and in which the latch-bolt is controlled by a door-handle spindle operating a retractor and a slidable link connected by a lever to the latch bolt to secure a retraction of said bolt for a multiple distance of the movement of the link, and including locking means for said spindle,

movable by a rotatable. spindle,the combination therewith of means forming a connection between said latch-bolt and said second spindle transportion of said member, said latch operating latch-bolt and a latch operating spindle, said mitting the reciprocable movement of said 1atchbolt upon being independently vdepressed to cause rotary movement of said second spindle and to set said locking means in a position permitting manual rotation of said first spindle.

5. In a lock having a substantially tubular housing and a reciprocable latch-bolt therein which is independently depressible to a retracted position, and in which the latch-bolt is controlled by a door-handle spindle operating a retractor,

and including locking means for said spindle, movable by a rotatable spindle, the combination therewith of means forming a connection between said latch-bolt and said second spindle transmitting the reciprocable movement of said latchbolt uponbeing independently depressed to cause rotary movement of saidsecond spindle and to set said locking means in a position permitting manual rotation of said first spindle comprising a pinion member connected with said locking means, driven by a toothed member connected with the latch-bolt.

6. Locking means for a door lock having a lock including an assembly whereby rotation of said spindle will retract the latch-bolt, the combination comprising a plate assembly positionable to one side of said lock and through which said latch operating spindle may extend, said plate assembly including locking means comprising a substantially circular member having a keying orifice through which said spindle may extend and a pinion connected with and driving a locking element, said pinion having a keying orifice through which an operating spindle therefor may extend, said member including a peripheral edge portion adapted to be interfitted by a portion of the locking element to hold said member against rotation.

' MORRIS FALK, 

